ITS CHARGING AT 14.5, SO?????
@RSM
Another "electrical mystery". In a properly-operating system, battery fully charged, 14.5 Volts would indicate something's wrong. It shows the alt. is feeding energy back into the battery, and, very possibly, the battery is going faulty, if the voltage stays that high for a long time. A brand-new, fully charged battery will put out a bit less that 13 volts, at rest, nothing going on. Turn the key to start, big current it delivers to the starter motor may drop the voltage to 10 volts or so, while cranking. Upon starting, alternator takes over providing ALL the power called for, part goes to the battery, part to everything else demanding power. During the time after starting, the voltage will be HIGHER than normal battery voltage, GREATER THAN 13 (using that as a full-battery output), in order to "push back" the energy the battery lost to the starter, into the battery. If cranked for, say, 5 seconds, that process may take less than about a minute, and voltage will drop back to around 13. During "refilling" of the battery, voltage might go as high as 15, even 16, depending on how much energy was removed from the battery by starting. Depends on cranking time, stiffness of the engine oil if v ery cold, and condition of the battery.
The ABS thing is tricky. The main chip in that G.D.'d thing is sensitive, brakes are a delicate safety issue nowadays, and there are far too many lawyers. So it throws the light on, if voltage is sensed too low. Your code reader may not be able to read ABS codes. If it can, it will ask if ABS code is desired. I believe any ABS lighht on (other than during "prove-out"), will throw a code. imp
